High-density powdered detergent composition

Abstract

A high-density powdered detergent composition which has a bulk density of 0.6 to 1.2 g / ml and which comprises 0.5 to 30% by weight of (a) a glycine-N,N-diacetic acid derivative, 5 to 45% by weight of (b) a nonionic surfactant having an HLB value of 10.5 to 15.0, 0.5 to 18% by weight of (c) an anionic surfactant and 1 to 30% by weight of (d) an aluminosilicate, each percentage being based on the total weight of the composition, and the weight ratio of the component (b) to the component (c) lying between 90:1 and 60:40. This composition contains both a glycine-N,N-diacetic acid derivative which is a builder excellent in biodegradability and sequestering power and an inorganic builder such as zeolite or crystalline silicate, and exhibits high detergency.

Description

1. Field of the InventionThe present invention relates to a high-density powdered detergent composition. In particular, it relates to a high-density powdered detergent composition exhibiting high detergency and containing an organic builder excellent in biodegradability.2. Description of Related ArtA detergent composition for clothes is basically composed of a surfactant which solubilizes soil, separates it from fibers, and dissolves or disperses it in a washing solution, an alkaline substance which accelerates the decomposition or solubilization of soil, a high-molecular compound which suspends soil in a washing solution, a sequestering agent which removes substances lowering the power of surfactants, for example, calcium or magnesium ions from a washing solution, and so on.Among these components, "builders for detergents" generally refer to substances which do not exhibit detergency per se but can enhance the detergency of a surfactant when used together with the surfactant. Among...

AI Technical Summary

Benefits of technology

The inventors of the present invention have made extensive studies for attaining the above aim. As a result of the studies, they have found that the detergency of a surfactant system comprising a nonionic surfactant as the base and a nonionic surfactant at a specific weight ratio can be enhanced dramatically by adding both a glycine-N,N-diacetic acid derivative serving as an organic builder and an inorganic builder in specific proportions respectively to the system. The present invention has been accomplished on the basis of this finding.

As described above, the present invention can provide a high-density powdered detergent composition which contains both an organic builder excellent in biodegradability and an inorganic builder and is enhanced in detergency.

Problems solved by technology

However, such phosphate salts are believed to be one of the factors causing the eutrophication of lakes, marshes and so on.

However, the particles constituting such a compact detergent are more highly compacted than those constituting the detergent of the prior art, thus being problematic in solubility.

In particular, zeolite which is one of the constituents of the compact detergent is insoluble in water per se, and therefore often causes the generation of water insolubles when washing with the compact detergent.

However, such a solution is often accompanied with the restriction of the formulation.

However, concern is shown for the use of these organic builders, because the organic builders are disadvantageous in that the sequestering power is unsatisfactory, that the toxicity to fish has been pointed out and / or that the biodegradability is poor.

In particular, no optimum formulation has been found as yet with respect to a high-density detergent composition which comprises a surfactant component comprising a nonionic surfactant as the base and a proper amount of an anionic surfactant, and a builder component comprising both the above organic builder and an inorganic builder such as zeolite or crystalline silicate.

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